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Add docs for espnow

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Oleg Kalachev
2026-05-21 05:46:01 +03:00
parent 2027514af7
commit 68f96417f3
4 changed files with 37 additions and 9 deletions
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docs/usage.md
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@@ -290,11 +290,8 @@ The Wi-Fi mode is chosen using `WIFI_MODE` parameter in QGroundControl or in the
* `0` — Wi-Fi is disabled.
* `1` — Access Point mode *(AP)* — the drone creates a Wi-Fi network.
* `2` — Client mode *(STA)* — the drone connects to an existing Wi-Fi network.
* `3` — *ESP-NOW (not implemented yet)*.
> [!WARNING]
> Tests showed that Client mode may cause **additional delays** in remote control (due to retranslations), so it's generally not recommended.
* `2` — Client mode *(STA)* — the drone connects to an existing Wi-Fi network (may cause additional delays, so generally not recommended).
* `3` — ESP-NOW mode — the drone uses ESP-NOW protocol for communication.
The SSID and password are configured using the `ap` and `sta` console commands:
@@ -316,6 +313,37 @@ Disabling Wi-Fi:
p WIFI_MODE 0
```
### Using ESP-NOW
[ESP-NOW](https://docs.espressif.com/projects/esp-idf/en/stable/esp32/api-reference/network/esp_now.html) is a low level wireless communication protocol. It can provide lower latency, better reliability, and longer range than Wi-Fi. However, it requires a second ESP32 board to be used as a proxy for the computer.
<img src="img/espnow-connection.jpg" width="600">
To setup ESP-NOW communication:
1. Flash the second ESP32 board with ESP-NOW proxy sketch: [`tools/espnow-proxy/espnow-proxy.ino`](../tools/espnow-proxy/espnow-proxy.ino). Use Arduino IDE or command line: `make upload_proxy`.
2. Open Serial Monitor or use `make monitor` command. The ESP32 will print its MAC address and generated encryption key, for example:
```
espnow 7a:c8:e3:eb:bf:e9 &PiuSysxP9+$L&5E
```
Run this line as a console command on each drone you want to bind to this proxy board.
3. Set the `WIFI_MODE` parameter to `3` on the drone:
```
p WIFI_MODE 3
```
4. Go to the QGroundControl menu ⇒ *Application Settings* ⇒ *Comm Links*, add new link with the following settings:
* Name: ESP32.
* Type: Serial.
* Serial Port: choose the port of the proxy ESP32 board, e. g. `/dev/cu.usbserial-0001`.
* Baud Rate: 115200.
5. Click *Save*. QGroundControl should connect to the drone using ESP-NOW and begin showing the telemetry.
## Flight log
After the flight, you can download the flight log for analysis wirelessly. Use the following command on your computer for that: